Link Tip: Create Your Own 2D Barcode

Ever wondered where those square pixel graphics come from? QR codes, or 2D barcodes, seem to be everywhere lately – for example at CeBIT last week and even on billboards. I have just come across the website goqr.me, where you can generate these codes yourself.

2D Barcode
2D Barcode

You can use the iPhone app Barcoo to read the barcode. If, for example, you store a telephone number in the code and scan it with the app, you can call the number with one additional tap. That could be quite practical on a business card … This ease of use is probably one reason the codes are spreading so quickly.

Here is the link again: QR Code Generator – Create QR Codes Online [2D Barcode, T-Shirt, Mug, Business Card, QR Code] – goQR.me.

Link Tip: How Much Does Google Earn per User Each Year?

How much do Google, Facebook & Co. earn per user – in other words, from me, you and everyone else? A Spiegel Online article investigates this interesting question. The figures do not all come from completely authoritative sources, as the author himself notes, but they nevertheless illustrate the relative scale of the online business quite well.

An interactive graphic visualises the data very clearly. From user numbers and annual revenue per user to annual profits and losses and company valuations, the Flash graphic shows who is still clearly ahead: Google.

The comparison also includes Facebook, Zynga, New York Times Digital, AOL, Huffington Post, Twitter and Xing. The article includes the sources for the figures as well, which is very useful for your own research. All that remains is to say thank you to the author, Spiegel Online technology journalist Konrad Lischka …

Here is the direct link to the article:

Revenue, Visitors, Valuation: How the Web Giants Make Money Online – SPIEGEL ONLINE.